1. Nur77 protects the bladder urothelium from intracellular bacterial infection.
- Author
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Collins CA, Waller C, Batourina E, Kumar L, Mendelsohn CL, and Gilbert NM
- Subjects
- Animals, Humans, Mice, Female, Mice, Inbred C57BL, Mice, Knockout, Phenylacetates, Nuclear Receptor Subfamily 4, Group A, Member 1 metabolism, Nuclear Receptor Subfamily 4, Group A, Member 1 genetics, Urothelium microbiology, Urothelium metabolism, Urothelium drug effects, Urothelium pathology, Uropathogenic Escherichia coli drug effects, Uropathogenic Escherichia coli pathogenicity, Urinary Tract Infections microbiology, Urinary Bladder microbiology, Urinary Bladder pathology, Urinary Bladder metabolism, Urinary Bladder drug effects, Escherichia coli Infections microbiology, Escherichia coli Infections drug therapy, Escherichia coli Infections metabolism
- Abstract
Intracellular infections by Gram-negative bacteria are a significant global health threat. The nuclear receptor Nur77 (also called TR3, NGFI-B, or NR4A1) was recently shown to sense cytosolic bacterial lipopolysaccharide (LPS). However, the potential role for Nur77 in controlling intracellular bacterial infection has not been examined. Here we show that Nur77 protects against intracellular infection in the bladder by uropathogenic Escherichia coli (UPEC), the leading cause of urinary tract infections (UTI). Nur77 deficiency in mice promotes the formation of UPEC intracellular bacterial communities (IBCs) in the cells lining the bladder lumen, leading to persistent infection in bladder tissue. Conversely, treatment with a small-molecule Nur77 agonist, cytosporone B, inhibits invasion and enhances the expulsion of UPEC from human urothelial cells in vitro, and significantly reduces UPEC IBC formation and bladder infection in mice. Our findings reveal a new role for Nur77 in control of bacterial infection and suggest that pharmacologic agonism of Nur77 function may represent a promising antibiotic-sparing therapeutic approach for UTI., (© 2024. The Author(s).)
- Published
- 2024
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